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Episode 28 of the Two Enthusiasts Podcast starts with some recent news: the closure of Skully and the near-passage of California’s lane-splitting law.

The conversation about Skully quickly moves from the failed startup, to a broader conversation about helmet design and the progress of technology in this space. The show then turns to California’s lane-splitting law, and what it could mean for motorcyclists in states other than California.

Once the news items are out of the way, the show spends a bit of time talking about crankshaft design, namely what it means to have a “crossplane” crankshaft.

Further down the rabbit hole, this turns into a larger conversation about how engines make their power, and how that power is tuned for specific tasks. It’s a tough subject to do only via voice, but we think you’ll enjoy it.

As always, you can listen to the show via the embedded SoundCloud player, after the jump, or you can find the show on iTunes (please leave a review) or this RSS feed. Be sure to follow us on Facebook and Twitter as well. Enjoy the show!

The tease of 2013 has to be Kawasaki and its supercharged four-cylinder engine, which the Japanese OEM debuted at this year’s Tokyo Motor Show. Showing the engine, and giving virtually no information about the intended uses of the supercharged power plant, we have been left to speculate over what Kawasaki’s intentions are in the two-wheeled forced-induction realm.

Diving through the Google’s database of patent applications though,  we see that over the years Kawasaki has published a number of patents that relate to adding a supercharger to a motorcycle. Not only has Kawasaki been thinking about how to fit a supercharger into a motorcycle for some time now, but the OEM has some clever tricks up its sleeve in order to optimize its designs.

Along with the official unveiling of the 2011 Yamaha MotoGP team & livery, the Japanese manufacturer has also released photos of the 2011 Yamaha YZR-M1, with accompanying technical specifications. Unsurprisingly, Yamaha is keeping many of its exact specifications close to the chest, but test reports indicate that a refined chassis, and a slightly more powerful motor have been added to the 2011 YZR-M1.

2009-motogp-yamaha-m1-4

Yamaha has unveiled its YZR-M1 for the 2009 MotoGP season in a special online presentation. On-hand for the event at Yamaha-Italy HQ were riders Valentino Rossi and Jorge Lorenzo. Yamaha’s rider line-up remains unchanged of course, and the 2009 bike is pretty much indistiguishable on the outside from the 2008 variant. However, its what’s underneath that counts. According to Tech3 team manager Poncharal, “Not one part of new M1 is the same as 2008 bike”. Continue on for pictures, specifications, and unveiling video.